Worst air pollution Valenciennes, today and tomorrow
Today (20 September): Air quality in Valenciennes is fair. AQI and PM2.5 are fair; PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (PM2.5: 22.5/100).
Tomorrow (21 September 2026): Air quality in Valenciennes is fair. PM10 increases to fair; NO2 increases to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 10:00 AM (NO2: 32.7/100). Airmine updates local air quality forecasts four times daily.
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In Valenciennes, former coalfield industry and motorway traffic is the primary local source affecting air quality, near the Scarpe, and North Sea winds sweep across the open plains, which helps maintain reasonable air quality across the year. Winter can see particulate build-up during still, cold spells, while summer generally benefits from stronger regional winds, aside from occasional cross-border ozone episodes.
Today - 20 September | Pollution peaks at 23:00
AQI:
Fair
22.5/100
PM2.5 (fine particles):
Fair
22.5/100
PM10 (coarse particles):
Good
16.6/100
NO2 (nitrogen dioxide):
Good
17.4/100
O3 (ozone):
Good
19.9/100
SO2 (sulfur dioxide):
Good
1.6/100
CO (carbon monoxide):
Good
0.8/100
HCHO (formaldehyde):
Good
2.4/100
PM1 (ultrafine particles):
Good
6.4/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 10:00
AQI:
Fair
32.7/100
PM2.5 (fine particles):
Fair
30.6/100
PM10 (coarse particles):
Fair
21.7/100
NO2 (nitrogen dioxide):
Fair
32.7/100
O3 (ozone):
Fair
26.4/100
SO2 (sulfur dioxide):
Good
2.6/100
CO (carbon monoxide):
Good
0.9/100
HCHO (formaldehyde):
Good
2.9/100
PM1 (ultrafine particles):
Good
11.3/100
Pollen forecast in Valenciennes
View pollen forecastFrequently Asked Questions
Is air quality bad in Valenciennes right now?
On 20 September 2026, overall air quality in Valenciennes is fair. AQI is the main air quality indicator at 22.5/100. Pollution peaks around 11:00 PM (PM2.5: 22.5/100).
Will air quality be worse tomorrow in Valenciennes?
On 21 September 2026, air quality conditions in Valenciennes will be similar to today, with AQI forecast at fair at 32.7/100. Pollution peaks around 10:00 AM (NO2: 32.7/100).
When is air pollution at its worst in Valenciennes?
In Valenciennes, the combination of former coalfield industry and motorway traffic and heavy birch and oak pollen in spring is what most affects sensitive groups; North Sea winds sweep across the open plains, so poor conditions rarely last more than a couple of days. The presence of Picardy and Artois arable plains in the area adds another layer to the local pattern.
Are air quality levels in Valenciennes based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 20 September 2026 at 14:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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